Place an aluminum foil baking pan on the grill and add the first three ingredients. Just as the mixture begins to boil reduce the heat to low to simmer.

Meanwhile, grill the bratwurst over low–medium heat until cooked through. Transfer brats into beer mixture and let simmer for 15–20 minutes before serving. The mixture can also be used as a holding tray for the brats to keep them warm for any stragglers.